We all know about the delicate of the iPhone 4’s glass back is. It’s not going to survive a 100′ fall and still work, let alone a 10′ one, so you might as well go for something funky. Gear heads will appreciate this all aluminum gasket case for iPhone 4, inspired by the looks of a head gasket of an engine, although it only has 3 cylinders, it looks like no other iPhone case we’ve seen before.